Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd464db5ff5835ba6b232a1662716be3a7e0ad457ba05036f8050cef74baf4f5f' 
  AND token = 'XV4oaVWkNSmkO0LPz01GV82qxHtdqSYrN1ypCWlG9n4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00014

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}